3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include <avr/pgmspace.h>
39 void keccak_dump_state(uint64_t a[5][5]){
42 cli_putstr_P(PSTR("\r\n"));
44 cli_putstr_P(PSTR(": "));
46 cli_hexdump_rev(&(a[i][j]), 8);
52 void keccak_dump_ctx(keccak_ctx_t* ctx){
53 keccak_dump_state(ctx->a);
54 cli_putstr_P(PSTR("\r\nDBG: r: "));
55 cli_hexdump_rev(&(ctx->r), 2);
56 cli_putstr_P(PSTR("\t c: "));
57 cli_hexdump_rev(&(ctx->c), 2);
58 cli_putstr_P(PSTR("\t d: "));
59 cli_hexdump(&(ctx->d), 1);
60 cli_putstr_P(PSTR("\t bs: "));
61 cli_hexdump(&(ctx->bs), 1);
68 static uint64_t rc[] PROGMEM = {
69 0x0000000000000001LL, 0x0000000000008082LL,
70 0x800000000000808ALL, 0x8000000080008000LL,
71 0x000000000000808BLL, 0x0000000080000001LL,
72 0x8000000080008081LL, 0x8000000000008009LL,
73 0x000000000000008ALL, 0x0000000000000088LL,
74 0x0000000080008009LL, 0x000000008000000ALL,
75 0x000000008000808BLL, 0x800000000000008BLL,
76 0x8000000000008089LL, 0x8000000000008003LL,
77 0x8000000000008002LL, 0x8000000000000080LL,
78 0x000000000000800ALL, 0x800000008000000ALL,
79 0x8000000080008081LL, 0x8000000000008080LL,
80 0x0000000080000001LL, 0x8000000080008008LL
83 uint64_t rotl64(uint64_t a, uint8_t r){
84 return (a<<r)|(a>>(64-r));
87 static uint8_t r[5][5] PROGMEM = {
90 { 62, 6, 43, 15, 61 },
91 { 28, 55, 25, 21, 56 },
95 void keccak_round(uint64_t a[5][5], uint8_t rci){
96 uint64_t c[5], d[5], b[5][5];
100 c[i] = a[0][i] ^ a[1][i] ^ a[2][i] ^ a[3][i] ^ a[4][i];
103 d[i] = c[(4+i)%5] ^ rotl64(c[(i+1)%5], 1);
111 cli_putstr_P(PSTR("\r\nAfter theta:"));
112 keccak_dump_state(a);
117 b[(2*i+3*j)%5][j] = rotl64(a[j][i], pgm_read_byte(&(r[i][j])));
121 cli_putstr_P(PSTR("\r\n--- after rho & pi ---"));
122 keccak_dump_state(a);
127 a[j][i] = b[j][i] ^ ((~(b[j][(i+1)%5]))&(b[j][(i+2)%5]));
131 cli_putstr_P(PSTR("\r\nAfter chi:"));
132 keccak_dump_state(a);
136 memcpy_P(&t, &(rc[rci]), 8);
139 cli_putstr_P(PSTR("\r\nAfter iota:"));
140 keccak_dump_state(a);
144 void keccak_f1600(uint64_t a[5][5]){
148 cli_putstr_P(PSTR("\r\n\r\n--- Round "));
150 cli_putstr_P(PSTR(" ---"));
156 void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
157 memxor(ctx->a, block, ctx->bs);
158 keccak_f1600(ctx->a);
161 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
162 while(length_b>=ctx->r){
163 keccak_nextBlock(ctx, block);
164 block = (uint8_t*)block + ctx->bs;
167 uint8_t tmp[ctx->bs];
169 memset(tmp, 0x00, ctx->bs);
170 memcpy(tmp, block, (length_b+7)/8);
173 /* we have some single bits */
175 t = tmp[length_b/8]>>(8-(length_b&7));
176 t |= 0x01<<(length_b&7);
179 tmp[length_b/8] = 0x01;
184 if(length_b/8+1+3<ctx->bs){
185 memcpy(tmp+length_b/8+1, pad, 3);
187 if(length_b/8+1+2<ctx->bs){
188 memcpy(tmp+length_b/8+1, pad, 2);
189 keccak_nextBlock(ctx, tmp);
190 memset(tmp, 0x00, ctx->bs);
193 if(length_b/8+1+1<ctx->bs){
194 memcpy(tmp+length_b/8+1, pad, 1);
195 keccak_nextBlock(ctx, tmp);
196 memset(tmp, 0x00, ctx->bs);
200 keccak_nextBlock(ctx, tmp);
201 memset(tmp, 0x00, ctx->bs);
208 keccak_nextBlock(ctx, tmp);
209 keccak_dump_ctx(ctx);
212 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
213 while(length_b>=ctx->r){
214 memcpy(dest, ctx->a, ctx->bs);
215 dest = (uint8_t*)dest + ctx->bs;
217 keccak_f1600(ctx->a);
219 memcpy(dest, ctx->a, (length_b+7)/8);
222 void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
223 keccak_ctx2hash(dest, 224, ctx);
226 void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
227 keccak_ctx2hash(dest, 256, ctx);
230 void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
231 keccak_ctx2hash(dest, 384, ctx);
234 void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
235 keccak_ctx2hash(dest, 512, ctx);
239 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
240 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
241 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
242 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
244 void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
245 memset(ctx->a, 0x00, 5*5*8);
249 ctx->bs = (uint8_t)(r/8);
252 void keccak224_init(keccak_ctx_t* ctx){
253 keccak_init(1152, 448, 28, ctx);
256 void keccak256_init(keccak_ctx_t* ctx){
257 keccak_init(1088, 512, 32, ctx);
260 void keccak384_init(keccak_ctx_t* ctx){
261 keccak_init( 832, 768, 48, ctx);
264 void keccak512_init(keccak_ctx_t* ctx){
265 keccak_init( 576, 1024, 64, ctx);